Results 151 to 160 of about 10,165 (196)

Planar rainbow refractometry

Optics Letters, 2021
Rainbow refractometry has been used in the past to measure size and refractive index of spherical particles, typically droplets in a spray. In the present study, conventional optical configurations for point measurements or line measurements have been extended to allow also the particle position in a plane to be determined, and hence, the designation ...
Can Li   +6 more
openaire   +2 more sources

Synthetic aperture rainbow refractometry

Optics Letters, 2022
This work proposed a synthetic aperture rainbow refractometry (SARR) by synthesizing rainbow signals of the same droplet with dual-wavelength laser beams, in order to increase the aperture of rainbow refractometry. In this way, the SARR can apply to long distance and small droplets measurement. An achromatic imaging system, which simultaneously records
Xinhao, Wang   +5 more
openaire   +2 more sources

Optical coherence refractometry

Optics Letters, 2008
We introduce a novel approach to refractometry using a low coherence interferometer at multiple angles of incidence. We show that for plane parallel samples it is possible to measure their phase refractive index rather than the group index that is usually measured by interferometric methods.
Peter H, Tomlins   +4 more
openaire   +2 more sources

Laser Meridional Refractometry

Optometry and Vision Science, 1976
Laser meridonal refractions were undertaken on 30 subjects. The results were compared to classical subjective techniques utilizing both correlative statistics and clinical criteria. The laser meridional techniques were highly correlated with the subjective procedures and were accurate when judged by clinical criteria.
C, Haine, W, Long, R, Reading
openaire   +2 more sources

Meridional Refractometry

Archives of Ophthalmology, 1970
Three methods for simplifying the solution of the equations used in meridional refractometry are outlined: solution by time-sharing, multiple-access digital computers; solution by special-purpose analogue computer; and solution by nomogram. The advantages and the disadvantages of each method are discussed.
R F, Brubaker   +2 more
openaire   +2 more sources

Refractometry of fungi

Journal of Microscopy, 1983
SUMMARYImmersion refractometry is based on matching the refractive index of the medium to that of the cytoplasm of the cell, in which case the latter will have minimum contrast in the phase contrast microscope and will practically disappear. The cytoplasm is then said to be at the match point with the medium. Since the refractive index of a solution is
openaire   +2 more sources

Meridional Refractometry

Archives of Ophthalmology, 1969
Meridional refractometry is a process whereby the meridional power of the corrective lens is measured in three predetermined meridians of the eye and the final prescription calculated from these data. The calculation is based on equations derived from Laurance's approximation of the meridional power of a cylindrical lens.
R F, Brubaker   +2 more
openaire   +2 more sources

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